Valved piston.



No. 658,9]2. Patented Oct. 2, I900. C. N. HARE.

VA'LVED PISTON. (Application filed Mixy 17, 1900.)

(No Model.)

. 7 UNITED STATES PATENT OFFICE.

oHARLEs N. HARE, OF BOWLING GREEN, OHIO.

VALVED PISTON.

SPECIFICATION forming part of Letters Patent No. 658,912, dated October 2, 1900.

Application filed May 17, 1900.

To all whom, it may concern:

Be it knownthat I, CHARLEs N. HARE, a citizen of the United States, residing at Bowling Green, in the county of Wood and State of Ohio, have invented certain new and use:

ful Improvements in Valved Pistons; and Ido declare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

In pumping oil-wells and'other deep wells it is extremely difficul-t to secure the suckers upon the plunger of the valved piston, commonly called the working valve, against becoming accidentally loosened and lost in the bottom of the well. This is largely due to the great resistance and pressure encountered at great depths. In pumping such a well when the parts which are requisite in constructing the valved piston become disarranged it usually entailsgreat labor, loss of time, and expense, and it is frequently necessary to remove the tubing from the well in or-' der to recover the lost parts and permit resumption of the operation of the well.

In the accompanying drawings, in which Figure 1 is a central vertical sectional elevation of my device and Fig. 2 a perspective view of the locking device hereinafter referred to, is illustrated a valved piston of approved construction and which is in general use in the oil fields. This valved piston is made up of an open chambered piece 1, containing a ball 2, serving as a valve, resting upon removable seat 3. bottom is screwed upon a tubular piece 4, upon which are slipped a series of leather buckets, washers, or suckers 5 5, between which are interposed collars 6 6. The two series of pieces 5 6 are now secured in place by means of an internally-threaded sleeve 7, screwed upon the eXteriorly-threaded portion of the sleeve 4 at bottom. When the sleeve 7 is tightly screwed in place, all of the parts are rigidly held in'assembled relation. Formed integral with the sleeve .7 is a downwardly-' projecting loop 8, which is used in screwing the sleeve 7 firmly in place.

The device thus far described is found to The chambered valve-piece l at serial No. 16,980. No modelserve its purpose admirably; but should the lower threaded sleeve 7 become loosened from its place it will be seen that all of the pieces 5 and 6 will slip down and off of the tube 4, thus interfering with the stroke of the plunger and with the flow of the oil or water.

My invention relates to and its object is to provide means for overcoming the difficulty here indicated, and more particularly to furnish a cheap, simple, durable, and efficient means for detachably securing the threaded sleeve 7, above referred to, in place in such fashion that it cannot become accidentally displaced. I attain these objects as follows: 9 is a cotter having at one end a lug 10 and at its other end a detent 11. This cotter is formed of resilient metal and is made sufficiently thin to serve as a spring. Through the tube 4 is an orifice 12. Extending downwardly from the orifice 12 is a groove 12, which at its lower end is deepened to form a slot 12 through the wall of the tube 4. In the Hat bottom face of the sleeve 7 is a series of notches 13, extending radially from the bore of the sleeve. These notches are of sufficient width and depth to'receive the detent 11. The piece 9 is laid into the groove 12*, with the lug 1O resting in the orifice 12 and with the detent 11 at the lower end of the piece 9 projecting outwardly. The pieces 5 and 6 may now be slipped into place over the tube 4. The piece 9 rests in its channel or groove in such manner that it will not interfere with the passage of the pieces 5 and 6 except at bottom, where the detent 11 projects beyond the circumferential circle of the tubular piece 4. The detent can, however, be sprung inwardly in its slot to permit the upward passage of the pieces 5 and 6. When all of the pieces 5 and 6 have been assembled as shown, the bottom sleeve 7 is screwed home, while the'detent 11 is pressed inwardly in its slot, the upper partof the cotter being rigidly held by one or more ofthe encircling sleeves 6. Upon the detent 13 being now allowed to spring outwardly into normal position it engages one of the notches l3, and thus the sleeve is prevented from becoming unscrewed. It for any purpose it becomes necessary to remove either of the parts 5 or 6, this may be readily accomplished by pressing inwardly the end of the piece 9, thus thereon, a spring-cotter having a detent at its lower end, normally in engagement with said screw-threaded sleeve and secured at its upper end by one or more of said alternating metal sleeves.

In testimony whereof I affix my signature in presence of two Witnesses.

CHARLES N. HARE.

ternating with a series of metal sleeves on Witnesses: said tube, a screw-threaded portion at the W. A. OWEN, bottom of said tube, a screw-threaded sleeve L. BROWN. 

